Projectile.



R. H. QUISLING.

PBOJEGTILE.

APPLICATION FILED AUG. 7, 1911.

v Patented Dec. 31, 1912.

I 1 Biz/enter i RASMUS HAGBABTH QUISLING, OF CHRISTIANIA, NORWAY.

PROJECTILE.

Specification of Letters Patent.

rammed Dec. 31. 1912.

Application filed August 7, 1911. Serial No. 642,338.

To all whom it may concern:

Be it known that I, RAsMUs HAGBARTH Qmsnmo, a subject of the King of Norway, residing at Christiania, Norway, have 1nvented certain new and useful Improvements in Projectiles; and 1 do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reterence marked I creasing at the same time. it is an easy task thereon, which form a part of this specifica tion.

The present invention relates to projectiles which are steered withoutrotation. The known projectiles of this kind in which the steering is established by a rearward extension of the projectile efiected by means of an ignited powder charge, have the drawback that the mechanism cannot resist the pressure of the driving charge without being destroyed, or the devices do not act with the regularity and speed which is necessary to produce a steering from the moment the projectile leaves the barrel of the tire-arm.

According to the present invention these drawbacks are avoided by constructing the steering member as a sleeve inclosing the s 1 pro ectile and being closed at the rear end by a cap, the projectile while in the barrel being forced forward in the sleeve by the pressure of the gas, generat. l in the projectile. pressing against the interior of the cap while the latter is forced forward by the driving charge. This generation of gas, which in a well-known manner is produced by ignition from the flame or the driving charge, in this instance takes place under such conditions as to enable the gas to escape automatically, as soon as its pressure exceeds by a certain amount the pressure (from the driving charge) acting on the bottom of the cap sleeve, or after the projectile has moved forwardly a certain distance in the sleeve. The pressureproduced by the said generation of gas in the projectile will act on the projectile itself as an additional pressure to that of the driving charge and an acceleration of velocity is thus imparted to the projectile with respect to the sleeve, while the latter is still in the barrel of the fire-arm, increasing the ultirnate initial velocity of the projectile to the same extent as if the barrel of the fire-arm were extended the distance bet ween the rear end of the projectile and the cap a. e. the distance the projectile has moved forwardly in the'sleeve. The cap at the same time will afford the necessary tightening and will resist the pressure of the driving charge even if this should be comparatively great. The pressure of the driving charge is decreasing during the forward motion of the projectile ceasing altogether immediately in front of the mouth of the barrel, and as the gas pressure in the sleeve is into so regulate the difference o1 pressure that the sleeve will be forced back on the projectile the moment the sleeve leaves the barrel.

A mode of carrying out the invention is illustrated in the accompanying drawing in which:

Figure l is a side elevation partlyin section of the projectile inclosed by the sleeve. Fig. 2 is a similar view the sleeve being in its rearward position, Figs. 3, i, 5,

6, 7 and 8 details and modifications.

A designates the body of the projectile and B the tubular extension sleeve which is provided with a cap or head C. The sleeve B has at its front end annular grooves l) and the rear end or the body of the projectile has an annular rib E. ln the middle of the cap C is provided a small aperture F and in the rear portion of the projectile a powder chamber G having discharge passages H. The cap rnav be secured to the sleeve either by screw threads. as shown in. Fig. 1, or in am other way so that the connection will a ord the resistance required. The cap C may be secured to the sleeve in a manner, which gives the connection a. still greater strength, and may, as shown in Figs. 4 to 8, be provided with devices capable of resisting gas pressure from the rear but yielding to a pressure of a certain force from the interior of the sleeve. in the constructional form illustrated in Figs. l and 5 these devices consist in a disk 1 covering openings J in the cap and being secured to the cap by a small tubular pin K. In Figs. 6 and 7 the openings L are shown covered by small plates M cemented or otherwise loosely attached to the outer side of the head. In the constructional form shown in Fig. 8 the disk I is cup-shaped and secured to the cap C simply by presslowing manner:

ing. In allicases these disks or plates respectively will be torn off as soon as the inner pressure exceeds a certain amount.

The described device operates in the fol- As soon as the flame oi thedriving charge reaches the cap C it will penetrate through the small aperture F into the-interior of the projectile igniting the powder in the chambers G. The flanges of the cap at the same time are pressed against the walls of the barrel and the pro ectiler is driven forwardly with greater acceleration of velocity than the sleeve; thereby the sleeve will forman extension of the projectile just before the latter leaves the bar-' rel the energy of the driving charge being at the same time utilized to better advantage than if the barrel were extended by a similar distance. As soon as the portion of the sleeve that is provided with grooves in gliding rearwardly reaches the rib E of the body of the projectile, its motion will be stopped thereby insuring the proper position of the tube relatively to the body of the projectile, so that theaxis (lithe tube" will be located in the extension of the axis of the projectile. V

Thev front wall portion of the sleeve B may be provided with suitable aperturesO,

(Fig. 2) to enable the gases in the sleeve to escape readily when the rib E of the projectile has passed said apertures.

hat I claim is:

A projectile comprising a body portion, asleeve surrounding the body, in which the latter is slidable, and operating to form an elongation of the gun barrel and a ca on the sleeve adapted to give way when the inside pressure exceeds the outside pressure by a certain amount, said sleeve having apertures near its front end for the escape of gas from the sleeve when the latter has been moved back relatively to the body. V

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

RASMUS HAGBARTH QUISLING.

'VVitnesses':

R. MAZMIRIR, THURID LrrJn. 

